<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta content="IE=edge" http-equiv="X-UA-Compatible">
    <meta content="width=device-width, initial-scale=1.0" name="viewport">
    <title>页面找不到</title>
    <style>
        html,
        body {
            margin: 0;
            padding: 0;
            border: 0;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100vh;
            width: 100vw;
        }
    </style>
</head>

<body>
<div>
    <h1>404</h1>
</div>
</body>

</html>